Diffusion Modeling

Diffusion Model Parameters

• a = boundary separation
• z = starting point (parameterized here as a proportion of boundary separation)
• t0 = lower bound of non-decision RT component
• st0 = range of uniform distribution of non-decision times. NDT distribution is U(t0, t0+st0)
• v.L = drift rate for lures
• v.W = drift rate for weak targets
• v.S = drift rate for strong targets
• sv.L = inter-trial drift variance for lures
• cv.T = inter-trial drift variance for targets (both weak and strong)

UVSD Model Paramters

• d.W = Mean of “weak” target distribution
• d.S = Mean of “strong” target distribution
• s = Varaibility of both target distributions
• crit1 = Threshold for conservative bias condition
• crit2 = Threshold for neutral bias condition
• crit3 = Threshold for weak bias condition

Subject 101

subject	strength	a	z	t0	st0	v	sv
101	L	0.998	0.617	0.342	0.185	-1.631	1.369
	W					0.293	2.256
	S					2.509

subject	-LL	fevals	gevals	niter	convcode	G2	p
101	123.863	103	950	66	0	47.067	0.025

Subject 102

subject	strength	a	z	t0	st0	v	sv
102	L	1.25	0.607	0.361	0.249	-0.284	1.481
	W					0.680	1.258
	S					1.402

subject	-LL	fevals	gevals	niter	convcode	G2	p
102	126.764	90	809	60	0	52.671	0.006

Subject 103

subject	strength	a	z	t0	st0	v	sv
103	L	0.77	0.672	0.373	0.164	-2.267	1.690
	W					0.873	2.403
	S					2.802

subject	-LL	fevals	gevals	niter	convcode	G2	p
103	127.594	100	821	61	0	60.131	0.001

Subject 104

subject	strength	a	z	t0	st0	v	sv
104	L	2.097	0.53	0.415	0.013	-2.426	1.878
	W					0.444	0.942
	S					1.319

subject	-LL	fevals	gevals	niter	convcode	G2	p
104	136.956	648	NA	NA	2	78.81	0

Subject 105

subject	strength	a	z	t0	st0	v	sv
105	L	0.897	0.705	0.245	0.29	0.333	0.943
	W					0.872	0.870
	S					1.768

subject	-LL	fevals	gevals	niter	convcode	G2	p
105	117.169	2944	NA	NA	2	46.798	0.026

Subject 106

subject	strength	a	z	t0	st0	v	sv
106	L	1.304	0.563	0.298	0.266	-1.465	1.153
	W					0.523	1.776
	S					2.438

subject	-LL	fevals	gevals	niter	convcode	G2	p
106	168.478	147	1217	87	0	140.157	0

Subject 107

subject	strength	a	z	t0	st0	v	sv
107	L	1.227	0.573	0.438	0.225	-2.074	1.531
	W					0.443	2.391
	S					2.280

subject	-LL	fevals	gevals	niter	convcode	G2	p
107	124.177	84	798	60	0	49.703	0.013

Subject 108

subject	strength	a	z	t0	st0	v	sv
108	L	1.003	0.519	0.39	0.118	-3.145	1.871
	W					1.559	1.865
	S					4.337

subject	-LL	fevals	gevals	niter	convcode	G2	p
108	140.415	97	793	59	0	108.472	0

Subject 109

subject	strength	a	z	t0	st0	v	sv
109	L	1.488	0.684	0.416	0.086	-3.936	2.265
	W					1.816	2.650
	S					4.988

subject	-LL	fevals	gevals	niter	convcode	G2	p
109	114.845	2314	NA	NA	2	60.568	0.001

Subject 110

subject	strength	a	z	t0	st0	v	sv
110	L	0.864	0.638	0.335	0.22	-1.703	1.103
	W					-0.324	1.252
	S					1.197

subject	-LL	fevals	gevals	niter	convcode	G2	p
110	137.186	78	816	58	0	71.727	0

Subject 111

subject	strength	a	z	t0	st0	v	sv
111	L	1.002	0.711	0.432	0.102	-2.816	1.594
	W					0.187	3.189
	S					3.535

subject	-LL	fevals	gevals	niter	convcode	G2	p
111	122.305	94	729	56	0	48.906	0.016

Subject 112

subject	strength	a	z	t0	st0	v	sv
112	L	1.279	0.634	0.434	0.173	-1.322	1.388
	W					0.131	0.725
	S					1.028

subject	-LL	fevals	gevals	niter	convcode	G2	p
112	114.727	1821	NA	NA	0	39.56	0.114

Subject 113

subject	strength	a	z	t0	st0	v	sv
113	L	1.28	0.559	0.482	0.127	-3.597	1.838
	W					0.605	1.169
	S					2.898

subject	-LL	fevals	gevals	niter	convcode	G2	p
113	117.698	3000	NA	NA	1	60.323	0.001

Subject 114

subject	strength	a	z	t0	st0	v	sv
114	L	1.082	0.646	0.294	0.268	-1.460	1.600
	W					0.273	2.322
	S					1.896

subject	-LL	fevals	gevals	niter	convcode	G2	p
114	147.959	785	NA	NA	0	92.359	0